Brake-shoe.



G. T. BOND.

BRAKE SHOE.

APPLICATION FILED JAN-19.1918. 1,2339.,

3 SHEETSSHEET 1.

Patented Oct. 29, 1918. I

q. T. BOND. BRAKE SHOE.

APPLlCATION FILED JAN. I9. 918.

1L,%%,789., Patented 001:. 29, 1918;

3 SHEETSSHEET 2.

6 T. BOND.

BRAKE SHOE.

APPLICATION FILED JAN-19.1918.

Patented Oct. 29, 1918.

3 SHEETSSH ET 8 Emvmhtoz holder.

era'rns Parana ora ion.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Get. as, rare.

Application filed January 19 1918. Serial No. 212,622.

Shoes, of which the following is a specification, reference being had therein to the accompanying drawings. I

This invention relates to car brake-shoes of compound type that include friction or wearing members, which contact with the wheel-treads,'and holders, which maintain the shoes on brake-heads. The invention provides means, as hereinafter set forth, whereby the shoe parts are held together in such manner that they may be assembled and disassembled without injury to the The two members thus associated form a unitary shoe, which is attached to the brake-head in the usual manner of shoes in general use.

The invention has in view the provision of a brake-shoe that will be more .economical in service than a reinforced or backed shoe of the usual form, which has to be removed and entirely scrapped when only a little more than half worn, because of liability of the wheel wearing through into the brakehead and thereby damaging it. It is to overcome this objection that the shoe is formed in the particular manner contemplated by the invention and to make the backs or holders available for subsequent use on new friction or wearing members.

The brake-shoe provided by the invention is simple to manufacture, its parts can be assembled quickly and easily and without the necessity of employing special tools, and the cast friction or wearing membercan be cleaned of adhering mold-sand and handled and transported without liability of damage of its parts.

My co-pending application Ser. No. 212,620, filed January 19, 1918, discloses forms of multiple-keeper and standard brake-shoes, with similar objects in view, in which threaded fasteners are employed to maintain the holding and wearing members together. The present invention is directed more particularly to removable fasteners, other than those of threaded types, for main taining the holding and Wearing members in unitary associatlon as complete shoes, the

fasteners being easily brought to and removed from the parts, and the invention provides forms thereof adapted for use with shoes of both the standard and multiplekeeper types.

When read in connection with the description herein, the features of the invention will be apparent from the accompanying drawings, forming part hereof, wherein embodiments of the invention are disclosed, for purposes of illustration.

While the disclosures herein now are considered to exemplify preferable embodiments of the invention, it is to be understood that it is not the intention to be limited necessarily thereto in interpretation of the claims, as alterations within the limits of the claims can be made without departing from the nature and spirit of the invention.

Like reference-characters refer to corresponding parts in the views of the drawings, of which Fig. 1 is'a side elevation, partly in section, of a multiple-keeper brake-shoe assembled and in place on a brakehead;

Fig. 2 is a fragmentary view of the rear side of the wearing member;

Fig. 3 is a transverse sectional view on the line III-III, Fig. 1;

Fig. 4 is a fragmentary plan view of a wearing member illustrative of another form of fastener;

Fig. 5 is a transverse sectionalyiew illustrative of the form of fastener shown by Fig. 4;

Fig. 6 is a fragmentary side'elevation, partly in section, showing a form of removable fastener insertible into the face of the wearing member and adapted for use in a shoe for service on a standard brake-head Fig. 7 is a plan view showing in part the holder and .in part the wearing member of the form shown by Fig. 6;

Fig.8 1s a fragmentary transverse sectional view on the line VIII-VIII, Fig. 7

tllll tlll , partly'in section, showing a form of remov- .nates the recesses or seats able fastener insertible from the sides into the wearing member and adapted for use 1n a shoe for service on a standard brake-head;-

Fig. 10 is a plan view showing in part the holder and in part the wearing member of the form shown by Fig. 9;

Fi 11 is a fragmentary transverse sectional view on the l1ne XI-XI, Fig. 10 and Fig. 12 is a perspective of the fastener. In all of the views in which those parts appear, 1 designates a bra-kediead, 2 desigor mortises formed therein for reception of a keeper 3 of a malleable or otherwise suitably formed brake-shoe back or holder 4' secured to a wearing member 5, and 6 designates a retaining-key disposed in longitudinal openings 7 in the brake-head and 8 in the keepers, the key and keepers maintaining the shoe on the head in a manner well known in the art.

In order that a worn wearin member may be removed from a holder an the latter again used successively in association with new wearing members, the invention provides fasteners that may be placed in position in the wearing member when it is desired to associate it with a holder. The arrangement is such that the fasteners will lock the holder and wearing member together and that the holder Wlll preterit the fasteners from moving to such positions as would permit of their withdrawal from the wearing member.

Figs. 1, 2, and 3 disclose an arrangement of bendable fasteners 9. A fastener of this kind preferably is formed from malleable sheet metal bent upon itself to form a foot 10 and an intermediate double-limbed shank 11. w

The wearing member is formed in its back or holder abutting face with recesses 12, each of alength and breadth to permit the foot 10 of a fastener to be placed therein. A passageway 13 extends from each end of the recess 12, its bottom lying in the same plane as the bottom of the recess, and it being of such dimensions as will permit the entrance of the foot fairly snugly thereinto. A slot 14, opening to the passageway and to the back of the wearing member, similarly-extends from midway of each end of recess 12. Ordinarily two recesses 12 will be located between each two adjacent places of contact of the wearing and holding members, and the passageways and slots will extend into transverse ribs or protuberances 15 constituting such contact places, so that one recess will serve for insertion and removal of two fasteners.

The back or holding member has openings 16 located in positions corresponding to the location of the slots 14 and of a dimension to receive fairly snugly the projecting portions of the shanks 11. When a wearing member and a holder are to be assembled to form a shoe, fasteners are placed in the recesses l2 and slid into the passageways and slots extending therefrom. Then the shanks of the fasteners are passed into the openings of the holder, and the two limbs of each shank are bent downwardly against the outer face of that member, whereby the two parts of the shoe are locked together.

In order to relieve the fasteners of the shearing stresses imposed upon the wearing member by contact of the tread of a movin wheel, each abutting portion of the back is @ormed with an opening or seat 17, which takes a correspondingly-positioned protuberance or projection 18 of the wearing member.

These protuberances project outwardly of the holding member a distance approximately the same as the thickness of the bentdown limbs of the shanks of the fasteners 9, and, when the shoe is in place 'on a brake-head the head rests against these protuberances .and bent-down portions of the shanks and operates to maintain the latter against bending from looking position.

Figs. 4 and 5 disclose a single-footed type of fastener 19, which is-formed of malleable sheet metal bent to form a laterally-extending foot 20 and a web 21. For each such a astening, recesses 12 and passageways 13 are provided in the wearing member in a form, but the slots 14 extend from one side of the passageways to the face of the wearing member, in order to conform to the shape of the fasteners. With this form of fastener, the openings 16 of the back or holding member are of dimensions corresponding to those of the webs 21. The fasteners are placed in the wearin member and passed into the openings of the holder in the same manner as with the previous form, and the projecting portions of the webs are bent downwardly against the face of the holder and the two' parts of the shoe thereby locked together. Preferably, the webs are of a thickness substantially that of the projection of protuberances or projections 18 and with them the bent-down portions of the webs constitute contact places for the brake' head, which maintains the webs against bending from looking positions.

form of fastener adapted for use in a shoe for service on a standard brake-head,

and which is insertible in recesses,-passagethe type bendable lip 25 extending before bending in the plane of the web.

- in the same plane before bending.

of the holder in the same manner as with the previous forms. After this is done, the lips 25 are bent laterally away from the openings 16 and over the face ofthe holder. The lower edges of the lips incline downwardly from the ends to the webs proper, as shown at 25, and the webs are just of such length that, when the lips are bent, the inclined edges thereof will have wedging action against the holder and tightly bind it to the wearing member.

A fastener somewhat similar to that of Figs. 6, 7 and 8, but adapted more particularly to be placed lateral y into theholding member, is disclosed by Figs. 9, 10, 11 and 12. This fastener 26, like that of the the other types, is formed of malleable metal out to produce an enlarged foot 27 a web 28, and a head enlarged by a lip 29, all lying After cutting, the foot is bent to lie in a plane substantially at right angles to that of the web, as seen in Fig. 11. A

For each of such fasteners to be used, the

wearing member is formed with a slot 30.

extending from one side inwardly am Lopening to the back-abutting face of the member. The slots correspond in cross section to the planetary shape of the fasteners-that is, they are larger at the bottom to receive the enlarged feet 27 and smaller at the top to correspond to the webs 28-and the series of slots are arranged alternately so that no two immediately adjacent slots open to the same side of the wearing member.

With this form of fastener, the openings '15 of the back or holder are of dimensions corresponding to those of the heads of the webs. The fasteners are inserted into the slots 30 and brought to the inner ends thereof. The holder is placed against the wearing member with the fasteners extending through the openings 16, and the lips 29, which are of a form. similar to the lips 25 of a previously-described. form, are bent laterally away from the openings 16 and over the holder and thereby caused to bind that ranged for association with a holder having an opening, a lug comprising a shank removably secured to the member and extending from the rear face thereof and having a portion arranged to be bent over after being passed through the holder-opening whereby to maintain the wearing member and holder together.

2. In a brake-shoe wearing member arranged for association with a holder having an opening, an elongated malleable sheetmetal lug comprising a shank removably secured to the member and extending from the rear face thereof and a portion arranged to be bent laterally after being passed into the holder-opening whereby to maintain the wearing member and holder together.

3. A brake-shoe wearing member arranged to have a fastener with an enlarged foot and a shank associated therewithto maintain it on a support, said member having in its rear side a recess arranged to receive the fastener-foot and a passageway for the foot and a slot for the fastener-shank extending from said recess.

4. A brake-shoe wearing member arranged to have fasteners with enlarged feet and shanks associated therewith to maintain it on a support, said member having contact places raised above the plane of its rear face and passageways for the feet and slots for the shanks of the fasteners extending into said contact places.

5. In a brake-shoe,a wearing member having in its rear side a passageway and a slot, a protuberance on the rear side of said member, a holder abutting said side of the wearing member and having a seat into which said protuberance extends and a holder-opening, and a bendable fastener in said passageway and slot having a shank extending through said holder-opening and bent over against the outer face of the holder, whereby the wearing member and holder are held together, said fastener before engagement with the holder being movalble into and out of said passageway and s 0t.

6. In a brake-shoe, a wearing member having in its rear side a recess and a passage-way and a slot leading from the recess, a protuberance on the rear side of said member, a holder abutting said side of the wearing member and having a seat into which said protuberance extends and a fastener-opening, and a bendable fastener in said passageway and slot having a shank extending through said holder-opening and bent over against the outer face of the holder, whereby the wearing member and holder are held together, said fastener before engagement with the holder being seatable in said recess and movable therefrom into said passageway and slot.

7. The combination of a brake-head having contact places, a holder abutting said contact places and having fastener-openings and seats at the places of contact, means whereb 5 the holder is maintained on the brake-hea a wearing member abutting said holder and having protuberances extending into said seats and slots with enlarged inner ends weaves alined at their open ends with said fasteneropenings, and fasteners in said slots extending through said fastener-openings and bent over and extending under the contact places of the brake-head.

In witness whereof, I have aflixed my signature.

GEORGE T. BOND. 

